You can stay in Nanjing Road. From there, you can walk to Jing'an Temple, the Bund, take sightseeing tunnel to Lujiazui to see Jinmao Building and World Financial Center. It also has convenient subway Line, you can use Line 1 to Huaihai Road and Xujiahui for shopping, Xintiandi to see old resident. I once walk to Yuyuan Garden/City God Temple (with bazaar and old street)from Nanjing Road, perhaps, half an hour. Jade Buddha Temple is also a must. You can finish them in two days. Use Subway Line 2 to Longyang Road, to take Maglev train to Pudong airport.